Electrical control apparatus



center causing the switch contacts 51 and 55 to open. The passage offluid under control of the pressure regulating device 15 insures thedischarge of the fluid under proper conditions of pressure while thetemperature of the fluid at discharge is regulated under control of theoperation of the apparatus within conductor 14 as described.

The apparatus of my invention has many applications such as a domesticwater heater in lieu of the familiar type of instantaneous gas heaternow installed in many homes. My invention also finds application in theheating of air, oil and other fluids where it is necessary to raise thetemperature quickly under conditions of high efliciency.

While I have described my invention in connection with a fluid heater itwill be understood that the principles of my invention may also beapplied to the heating of anything which can be forced through a pipe.The intense heat which is developed in the secondary tubular winding dueto the shunt power across the winding, enables heat to be producedinstantaneously and enables hot water and steam to be maintained at adesired temperature in a storage tank. The production of steam power byuse of the apparatus of my invention provides means for driving enginesand developing motive power for automobiles, ships, airplanes and othervehicles.

I have found the apparatus of my invention highly practical in itsconstruction and operation and while I have described my invention inone of its preferred embodiments, I desire that it be understood thatmodifications may be made and that no limitations upon my invention areintended other than are imposed by the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is as follows:

1. In a fluid heater, a housing, an electrical transformer having a coreprovided with vertical legs supported in said housing, a primary windingcoiled about one leg of said core, a fluid pipe of hollow metallictubing extending into said housing and having a portion formed into asingle coil about the other leg of the core in spaced relation theretointermediate the height of the leg to form a secondary windinginductively related to said primary winding, portions of the tubeadjacent the coil being bridged by conductive material, a cylindricalcasing about the second mentioned leg of the core and secondary windingand adjoining portions of said tube, said casing having heads at itsupper and lower ends bearing against upper and lower portions of thecore, a packing of heat insulation filling said casing and disposedabout the secondary winding and between the winding and leg of the core,and temperature controlled means associated with the fluid pipe withinthe housing for regulating the flow of current through the primarywinding.

2. In a fluid heater, a housing, an electrical transformer in saidhousing having a core provided with spaced legs, a primary winding coilsupport carried by one leg of said core, a primary winding carried bysaid support and having exposed surfaces for radiating heat within thehousing, a fluid pipe of hollow metallic tubing extending into saidhousing and having a portion formed into a single coil about the otherleg of the core in spaced relation thereto to form a secondary winding,a bridge of conductive material being connected across the ends of saidsecondary winding, a casing disposed about the second mentioned leg ofsaid core and the secondary winding and adjoining portions of the tubingforming said secondary winding, and a packing of heat insulatingmaterial filling said casing and disposed about the secondary windingand between the winding and leg of the core.

3. In a fluid heater, an electrical transformer having a core providedwith spaced legs, a primary winding coil support carried by one leg ofsaid core, a primary winding mounted on said support, said supporthaving exposed surfaces for radiating heat from the same, a fluid pipeof hollow metallic tubing having a portion formed into a coil about theother leg of the core in spaced relation thereto to form a secondarywinding, a casing individual to the second mentioned leg of said coreand the secondary winding and adjoining portions of said tubing, and apacking of heat insulating material filling said casing and disposedabout the secondary winding and between the winding and leg of the core.

LYNOTT B. ROOT.

June 12, 1934. G|LMAN 1,962,864

ELECTRICAL CONTROL APPARATUS Filed Dec. 9, 19:53

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